Abstract:
:Aerobic soil metabolism of uniconazole-P ([S]-E-1-[4-chlorophenyl]-4,4-dimethyl-2-[1,2,4-triazole-1-yl]-penten-3-ol) and the effect of illumination on metabolic profiles were studied in the water-sediment system when spiked to water. Uniconazole-P was gradually partitioned to the sediment with an aquatic half-life of 6.9 d in darkness with formation of bound residues. Illumination of the system from a xenon lamp (>290 nm) greatly accelerated the degradation of uniconazole-P via photoinduced isomerization between E- and Z-isomers with a subsequent intramolecular cyclization, and its aquatic half-life was greatly reduced to 0.6 d. Kinetic analysis based on compartment models suggested the possible contribution of photodegradation at the water-sediment interface, leading to more formation of the cyclized derivative in the sediment.
journal_name
Environ Toxicol Chemjournal_title
Environmental toxicology and chemistryauthors
Kodaka R,Sugano T,Katagi Tdoi
10.1897/05-116ra.1subject
Has Abstractpub_date
2006-02-01 00:00:00pages
310-6issue
2eissn
0730-7268issn
1552-8618journal_volume
25pub_type
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